Apparatus for treating ores.



Patented June 27, 1916.

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APPARATUS FOR TREATING 0RES APPLICATION FILED DEC. 3, I914.

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c. w. S INGER. APPARATUS FOR TREATING ORES.

APPLICATION FILED DEC. 3, I914. 7 1,188,566. Patented June 27, 1916.

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APPARATUS FOR TREATING ORES.

APPLICATION FILED DEC. 3,1914.

Patented June 27, 1916.

3 SHEETS-SHEET 3- ss AT CHARLES W. SINGER, OF LINDEN, WISCONSIN, ASSIGNOR TO CAMPBELL MAGNETIC SEPARATING COMPANY, A CORPORATION OF ARIZONA.

APPARATUS FOR TREATING ORES.

Specification of Letters Patent. Patented J 11113 27 1916 Application filed December 3, 1914. Serial No. 875,255.

To all whom it may concern Be it known that 1, CHARLES W. SINGER, a citizen of the United States, residing at Linden, in the county of Iowa and State of WVisconsin, have invented new and useful Improvements in Apparatus for Treating Ores, of which the following is a specification.

My invention relates to rotary furnaces and the like, and its object is to provide supporting, actuating and adjusting means therefor which are more efficient and durable, and are more convenient and economical to assemble and operate, than any heretofore employed.

The mechanism of my invention hereinafter described and claimed is especially well adapted to use with the type of furnace of kiln described and claimed in my companion divisional application for Letters Patent, Serial Number 35,949, and in the drawing filed herewith I have shown it so'coinbined. It may however be employed to advantage in combination with any rotary furnace including the general type disclosed by Letters Patent to Etherington, No. 1,051,494, for the purpose of performing the process described and claimed in Letters Patent to Etherington, No. 1,053,486, and other processes, and I do not limit myself to use with any specific device or class of devices whatsoever.

An important feature of my invention consists of the means whereby the durability of the furnace or kiln is greatly increased. It consists in securing .the driving gear ring to that section of the furnace which is not exposed to the extreme heat from the burner, and also in mounting the track rings so that they are not secured to the shell of the furnace, but are independent, and thereby compensation is made for the unequal contraction and expansion of the shell and the parts connected therewith.

The means by which the pitch of the furnace may be regulated is another feature of great merit, as the ability to subject the ore to the action of heat with precision with reference to the period of exposure is a very important matter owing to the fact that the excellent character of the concentrates obtained after separation results very largely from accurate application of the proper degree of heat and exposure of the ore thereto during an exact period. Other improvements reside in the adjustable connecting means between the kiln and the smoke chamber, the adjustable means for maintaining proper meshing relation between the driving gears, and various details of construction and arrangement to be hereinafter more particularly described and set forth.

The term line of draft whenever used herein shall be understood to include the space .embraced within imaginary lines drawn.from all points in the periphery of the air inlet to corresponding points in the periphery of the air outlet. v

In the accompanying drawing Figure 1 represents a side elevation of my novel rotary furnace or kiln equipped with my improved supporting, actuating and adjusting mechanism, Fig. 2 represents an elevation of the discharging end of the same kiln; Fig. 3 represents an elevation of the receiving end thereof; Fig. 4 represents a transverse section of Fig. 1 through the line AB, showing the rollers 15 and 16 and their supporting brackets in side elevation. Fig. 5 represents a transverse section of Fig. 1 through the line C-D, and shows the rollers 13 and 14 and their brackets in side elevation. Fig. 6 is a detail elevation of the means for adjusting the positions of the brackets 31 and 32. Fig. 7 is'a detail plan of the under side of the same. Fig. 8 is an elevation of the side of the smoke chamber adjacent the kiln showing the sliding plate 66 and its clamping means. Figs. 9 and 10 are details of portions of the blocks 26 and T irons 25 showing their relation and the wedge form of the former, Fig. 10 being an elevation of a portion of the ring 12, and a section of cerflame from a hydro-carbon burner 60 is projected into the furnace.

The collar 7 riveted to the larger end of the section 5 in such manner as to project beyond the edge of the section, is adapted to receive the smaller end of section 6, and to secure together the sections and 6 in the relations shown in Fig. 1 with their edges in abutment when said sections are thus assembled, so as to form a continuous and gradually tapering furnace or kiln free from transverse shoulders or obstructions on the inside. Bolts 8 extending through lugs 9 secured by any suitable means to the sections 5 and 6 respectively adjacent the collar 7 serve to bind the sections 5 and 6 together and form a tight joint 10 between them. The furnace or kiln is rotatably supported by the track rings 11 and 12, which encircle the sections 5 and 6 respectively and rest respectively on the rollers 13 and 14 journaled in brackets 31 and 32, and rollers 15 and 16 journaled in brackets and 34 supported on the bed of the furnace 17. The ring 11 is provided on the-inside with an annular flange 18, which rests loosely in the slots 19 formed in the brackets 20, which are riveted to the section 5. In Fig. 5 the grooves 19 are shown to be formed by riveting plates 21 to both sides of the brackets 20, so that the plates project beyond the extremities of the brackets. The ring 12 is provided with an annular flange 22, which rests loosely in slots 23 formed in the guides 24 which guides are fastened to the T irons 25 by the bolts 25 The ring 12 rides freely upon the grooved blocks 26 which are also bolted to the T irons 25. The grooves 26 in the blocks 26 embrace and slidably engage the uprights 29 of the T irons 25 which are provided with a series of bolt holes 26 one inch apart registering with similar series of holes 26 in the extension sides 26 of the blocks 26. Owing to the fact that the surfaces of the blocks adjacent the flange 22 of the ring 12 are not parallel to the lines of bolt holes 26 the blocks are adapted to operate as wedges as they may be adjusted on the T irons in various relations to the guide members 24 and thus all caused to bear simultaneously against the flange 22 of the ring 12 or not, as desired. The ends of the T irons 25 are loosely supported in sockets 27 which consist of plates bolted or otherwise secured to the shell of section 6 in such manner as to provide a space sufficient for the T irons 25 to slide freely under the same. The plates 27 forming the sockets are also provided with slots 28 adapted to receive the upright portions 29 of the T irons 25 and to allow the same to freely play therein as a result of the unequal expansion and contraction of the T irons 25 and the section 6. This means of slinging the ring 12 permits free and independent contraction and expansion of the parts connected therewith, and yet provides a secure assemblage of the same. The means described of slinging the ring 11 also permits certain freedom of independent contraction and expansion of the section 5 but the ring 11 being located a greater distance from the source of heat than the ring 12 is located, it is not necessary to employ an arrangement to compensate for this expansion and contraction so elaborate as that provided for the ring 12.

35 and 36 are guide rolls supported in vertical bearings in the brackets 37 and 88, and are adapted to bear against the opposite sides of the rim of the ring 11, and thereby to prevent longitudinal displacement of the furnace or kiln.

The bed 17 is pivotally supported at one extremity at 40, and is adjustably supported at the other extremity by the jack screws 41 operating in screw threaded collars 43 secured to the bed of the furnace, said jack screws resting upon the base 42.

44 is the main shaft which transmits the power through the auxiliary shafts 46, 47, the beveled gears 48, 49, the counter shaft 50 and the pinion 51 to the gear ring 45 secured to section 5 of the furnace. The shaft 46 is connected with the shafts 44 and 47 by means of the universal joints 52 and 53 which permit the bed 17 to be elevated or depressed by the jack screws 41 without disturbing the position of the shaft 44. The beveled gear 48 is keyed to the shaft 47 which is mounted in bearings in the bracket 54 supported on the bed 17. The

beveled gear 49 in mesh with the gear 48 is keyed to the shaft 50 mounted in bearings in the brackets 55 and 56 secured to the bed 17. The pinion 51 is also keyed to the shaft 50.

Longitudinally disposed on the interior of the kiln 4 are shallow strips of steel 57 adapted to stir and mix the ore as the kiln is rotated. These shallow strips need not be more than one inch or one and a half inches in height, and approximately one or two inches in width, forming a little more than longitudinal ribs or corrugations sulficient for the purpose of agitating the ore slightly without lifting it to any material extent. Y

The'head 58 of the section 6 is provided with discharge ports 61 adjacent the periph ery of the head through which the roasted ore is discharged.

62 is a cap riveted to the feed extremity of the section 5 provided with a central flanged annular aperture 63, the flange .64 of which protrudes through the aperture in the plate 66 slidably clamped to the wall 67 of the smoke chamber or flue 68, and through the aperture'69 in the wall 67 which aperture is made larger than the aperture 65 which closely surrounds the flange 64. The screw clamps 7O engage the vertical slots 71 which permit the kiln together with the "plate 66 to be elevated or depressed without disturbing the position of the smoke chamber 68.

74 is the telescoping upper section of the feed pipe through which the raw ore is delivered into the kiln, 74 is the adjustable lower section positioned so that the orifice 75 is entirely below the aperture 63 and therefore the line of heavy draft, which relation'is at all times maintained by securing the adjustable section 74 by any suitable means as the bracket 7'4 to the plate 66. The location of the discharging end of the feed pipe into the kiln below the opening into the fiew or smoke chamber, is an important feature in that the ore falling therefrom is not deposited into the path of the blast of air or draft through the kiln. The importance of this consists in avoiding the loss of the fine particles of ore into the flue by reason of being caught up in the currents of air that are circulating through the kiln.

In Figs. 6 and 7 is shown adjusting means to compensate for the wearing away ,of the contact surface of the track rings 11 and 12 which if not counteracted permits of a gradual sinking of the kiln '4 and consequent excessively deep meshing and jamming of the gear ring 45 with the pinion 51 and ultimate destruction of the latter. This means consists of the following parts: The right and left screw 7 6 is journaled to rotate in bearings 82 and 83 of brackets 77 and 79 respectively, the right hand threaded portion engaging a lug 80 fast to the bracket 77 and the left hand threaded portion engaging a lug 81 fast to the bracket 79. The screw 76 is held against longitudinal displacement by abutting against the side Wall 17 of the bed 17 at one extremity thereof and has fast thereto a collar 78 which-abuts against the side wall 17 of the bed 17 near its other extremity. The brackets 77 and 79 are secured to plates 84 and 85 respectively, disposed beneath the bed 17. Bolts 86 passed through the plate 84, base of the bracket 31 and slots 87 in the bed 17, and bolts 88 passed through the plate 85, base of the bracket 32 and slots 89 in the bed 17 secure the plate 84 to the bracket 31 and the plate 85 to the bracket 32. It is obvious that by turning the terminal nut 90 with which the right and left 'screw 76 is provided, the plates 84 and 85, and thus the brackets 31 and 32 to which they are bolted may be brought into greater or less proximity, as

desired, within the latitude permitted bythe length of the slots 87 31161189 and according to the direction in which the nut 90 is turned by bringing the brackets 31 and 32 into greater proximity the rollers 13 and 14 5,

are likewise brought closer together and thus the gradual diminution in the pe-' riphe'ra'l dimension of the track rings 11 and 12 caused by frictionalwearing away of the 7 surface in contact with the rollers 13 and 14 and the rollers 15 and 16 is compensated,

The operation of my improved apparatus is as follows: The kiln 4 is set at the desired pitch by means of the screws 41 which serve to elevate or depress the bed 17 on which the kiln is supported through engagement with the screw threaded collars 43 secured to the bed 17 The carbon burners are then adjusted to give the desired mixture of oil and air and angle of projection of flame and ignited. Power is applied to the shaft 44 and thus the kiln- 4 slowly rotated on the rings 11 and 12 and rollers 13, 14, '15 and 16. Crushed raw ore is delivered into the feed pipe upper section 74 and discharged from the orifice 75 at the'upp'er end of the kiln at a pointbelow the line of draft. Thus particles of fine dusty ores are not blown back through the opening 63 but are deposited'on the bottom of the kiln and subjected to the heat from the burners. As the kiln rotates the mixers 57 slightly stir or agitate the ore, thus presenting the various particles successively to the heat, but do not lift the ore any substantial distance owing to their shallow construction, and so all possibility of dropping the ore back into the path of the blast is obviated. Advanced by the force of gravity the ore gradually travels in a body along the bottom of-the kiln, first becoming heated and then roasted and the ferruginous constituents magnetized as the particles are subjected to the greatest degrees of heat in the section 6, and finally reaching the head 58 is discharged through the ports 61. If the ore exhibits tendency to under roasting the period of subjection to the flame maybe lengthened by depressing the feed end of the kiln 4 by means of the screws 41; if it appears to be over roasting the kiln may in like manner be elevated and the period 7 shortened; in this manner the rate of speed of the ore through the kilnunay be accurately controlled and adapted at-all times to the character of the ore under treatment. If any adjustment-of the pitch of the kiln is to be made the clamps 7 0 are first loosened thus permitting the flange 64 to move the plate 66 1i3O1GOIlfOID1 :to the altered position of the flange. As the plate 66 is moved the position of the adjustable feed pipe section 74 secured thereto is correspondingly altered and the proper relation between the orifice 75 and the aperture 63 thus main tained. After the adjustment is made the clamps are then turned down to hold the plate firmly in the required new position. In making adjustments of the brackets 31 and 32 to compensate for the wearing of the track rings 11 and 12, it is first necessary to jack the kiln up in order to take the weight off of the rollers 13 and 14. The nut is then turned the required amount to bring the rollers into such proximity as to effect a proper meshing relation between the gear ring 45 and pinion 51. The kiln is then unjacked and again-eased on to the rollers. Owing to the novel free system of assemblage of parts in my apparatus the life of the kiln shell is greatly prolonged; when however the section 6 which is subjected to the greatest heat becomes burnt out a new section may readily be substituted by removing the bolts 8 and detaching the section 6 from the section 5 and bolting on the new section, such of the T irons, lugs, sockets, blocks and guide members being retained for assembling with the new section as are fit for further usage. The head 58 may likewise be unbolted and bolted on the new section if still intact. In dismantling the lugs 9, sockets 27, T irons 25, blocks 26, guide members 2% and bolts 59, the bolts 8 are first unbolted allowing-section 6 to be separated from section 5 and removed to a convenient place. The blocks 26 and guide members 24: are then unbolted and the rlng 12 is slipped off. Then the rivets are sheared on lugs 9, sockets 27 and bolts 59, thus allowing the head 58, T irons 25, lugs 9, sockets 27 and bolts 59 to be removed. The sockets 27 to secure one end of the T irons 25 are then riveted in their proper positions on one end of new section 6, the T irons slipped into place and the remaining sockets 27 placed over the other ends of the T irons and riveted to they shell, care being taken that suilicient space for eX pansion of the T irons is provided. lugs 9 and bolts 59 are then riveted in place, ring 12 slipped on, and blocks 26 and guides 2a bolted to the T irons to secure ring 12 in proper position. Head 58 is then bolted on and section 6 fitted in to section 5 and bolted. The kiln is now ready for further operation.

What I claim and desire to secure by Letters Patent is:

1. The combination of a rotatable furnace and a track ring encircling the same, said ring and furnace being free to rotate independently of each other.

2. A metallic furnace combined with means for rotatably supporting said fur- The nace embodying a track ring encircling the furnace, and means secured to the furnace adapted to loosely retain said ring in proper relation to the furnace, and to permit said ring and furnace to rotate independently of each other.

3. A rotatable metallic furnace provided with a plurality of socketed members secured thereto and supporting members loosely retained by said socketed members, combined with a ring encircling the furnace and resting on said supporting members.

4. A rotatable metallic furnace provided with a plurality of socketed members secured thereto, T irons loosely retained by said socketed members and supporting members and guide members secured to said T irons, combined with a track ring resting on said supporting members and loosely retained in position by said guide members.

5. A rotatable metallic furnace provided with a plurality of sockets secured thereto, T irons loosely retained by said sockets, notched guide members secured to said T irons, wedges secured to said T irons, and means for adjusting the positions of said wedges relatively to said guide members, combined with a track ring resting on said wed es and loosel retained in aosition b the notches in said guide members.

6. A rotatable unlined metallic furnace composed of two or more sections detachably assembled, one of said sections being provided with a plurality of sockets secured thereto, T irons loosely retained by said sockets, notched guide members secured to said T irons, wedges secured to said T irons, and means for adjusting the positions of said wedges relatively to said guide members, combined with a track ring resting on said wedges and loosely retained in position by the notches in said guide members.

7. The combination of an adjustably supported rotatable furnace, means for raising and lowering the smoke outlet end of said furnace, a smoke chamber provided with an aperture in its wall through which said end protrudes, said aperture being of greater area than the area of said end, a plate provided with an aperture slightly larger than said end closely fitted about said end and in contact with the smoke chamber wall, vertical slots in said plate registering with bolt holes in said wall, bolts engaging said slots and holes, and clamping thumb screws en- A gaging said bolts.

8. The combination of an adjustably supported rotatable furnace, means for raising and lowering the smoke outlet end of said furnace, a smoke chamber provided with an aperture in its wall through which said end protrudes, said aperture being of greater area than the area of said end, a plate provided with an aperture slightly larger than said end closely fitted about said end and in contact with thesmoke chamber Wall, verti In testimony whereof I have hereunto set cal slots in said plate registering with bolt my hand in presence of tWo subscribing Witholes in said Wall, bolts engaging said slots nesses, this 23rd day of November 1914.

and holes, clamping thumb screws engaging CHARLES W. SINGER. 5 said bolts, and an ore feed pipe located in Witnesses:

said smoke chamber and secured by any suit- WILLIAM D. COOK,

able means to said plate. EARLE C. WEARING.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of l'atentn. Washington, ILG." 

